/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.io.aws.sns;



import com.amazonaws.auth.AWSCredentialsProvider;

import com.amazonaws.auth.AWSStaticCredentialsProvider;

import com.amazonaws.auth.BasicAWSCredentials;

import com.amazonaws.client.builder.AwsClientBuilder;

import com.amazonaws.regions.Regions;

import com.amazonaws.services.cloudwatch.AmazonCloudWatch;

import com.amazonaws.services.cloudwatch.AmazonCloudWatchClientBuilder;

import com.amazonaws.services.sns.AmazonSNS;

import com.amazonaws.services.sns.AmazonSNSClientBuilder;



import javax.annotation.Nullable;



import static com.bff.gaia.unified.vendor.guava.com.google.common.base.Preconditions.checkArgument;



/** Basic implementation of {@link AwsClientsProvider} used by default in {@link SnsIO}. */

class BasicSnsProvider implements AwsClientsProvider {



  private final String accessKey;

  private final String secretKey;

  private final Regions region;

  @Nullable

  private final String serviceEndpoint;



  BasicSnsProvider(

      String accessKey, String secretKey, Regions region, @Nullable String serviceEndpoint) {

    checkArgument(accessKey != null, "accessKey can not be null");

    checkArgument(secretKey != null, "secretKey can not be null");

    checkArgument(region != null, "region can not be null");

    this.accessKey = accessKey;

    this.secretKey = secretKey;

    this.region = region;

    this.serviceEndpoint = serviceEndpoint;

  }



  private AWSCredentialsProvider getCredentialsProvider() {

    return new AWSStaticCredentialsProvider(new BasicAWSCredentials(accessKey, secretKey));

  }



  @Override

  public AmazonCloudWatch getCloudWatchClient() {

    AmazonCloudWatchClientBuilder clientBuilder =

        AmazonCloudWatchClientBuilder.standard().withCredentials(getCredentialsProvider());

    if (serviceEndpoint == null) {

      clientBuilder.withRegion(region);

    } else {

      clientBuilder.withEndpointConfiguration(

          new AwsClientBuilder.EndpointConfiguration(serviceEndpoint, region.getName()));

    }

    return clientBuilder.build();

  }



  @Override

  public AmazonSNS createSnsPublisher() {

    return AmazonSNSClientBuilder.standard()

        .withCredentials(getCredentialsProvider())

        .withRegion(region)

        .build();

  }

}